Many of the techniques used to make a dalek can be applied to many other types of prop building.

Design

CAD Modelling: I currently use AutoDesk Inventor as my CAD modelling tool of choice but I have also used Solidworks in the past.
Plotter: I print plans and templates on my 36" HP Designjet 450c plotter. This was acquired for $75 on EBay and made to work with new belts, a thorough cleaning and new cartridges.
3D Printing: I have a MendelMax2 printer which has yet to meet my expectations due to some design issues that I hope are fixed by the MendelMax 3 upgrade kit.

Fabrication

Paste-A-Template: or poor man's CNC.: One of the techniques I use quite frequently is to print out a pattern for a part on the plotter and paste it to the part as a guide to cutting out.
Working with Fiberglass: Fiberglass is smelly and dangerous to work with. But it is the best way to make almost anything that needs to be strong and light.
Working with Silicone: Platinum cured silicone is the king of mold making materials. It is easy to use and parts usually pop out without the need for any persuasion. The only downside is that it is very expensive.
Paint: After all the work and effort that goes into making a prop, most people will only see the outer surface. Getting paint right is one of the hardest parts of prop making.

CNC: I have a Sherline mill and lathe for metal work and a Shapeoko mill that can be configured for larger projects. I also use the ShopBot at the Artisan's Asylum.
Wood Shop: My main tools are a table saw, bandSaw, planer, jointer, drill press, mortiser and a miter saw.
Metal Shop: In addition to the CNC lathe and mill mentioned earlier, I have a Lincoln welder.